New RepRap to slowly be built from Objet parts.

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Thu, 27 May 2010 19:18:53 -0400

Geared so both wheels with the threaded groove spin not just one with a bearing. Will be driven by one large pulley with a toothed belt going to a NEMA 17. The two wheels will be spring loaded so there is constant squeeze on the filament. It's going to be sweet.

Re: New RepRap to slowly be built from Objet parts.

tesla893 — Wed, 26 May 2010 22:39:59 -0400

Try a geared extruder...
[reprap.org]
or
[reprap.org]

Curlrup Wrote:
-------------------------------------------------------
> Well...my Darwin is working great except the darn
> extruder will not grab that filament consitantly.
> I also have some leftover material from an old FDM
> machine so i am going to rebuild my extruder to
> accept the 1 mm filament and do some reverse
> engineering on some old FDM pinchwheels. Time to
> hit the machine shop.....

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Wed, 26 May 2010 21:26:33 -0400

Well...my Darwin is working great except the darn extruder will not grab that filament consitantly. I also have some leftover material from an old FDM machine so i am going to rebuild my extruder to accept the 1 mm filament and do some reverse engineering on some old FDM pinchwheels. Time to hit the machine shop.....

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Wed, 17 Mar 2010 22:09:44 -0400

Bad STL file fixed that now I am waiting for a gear to arrive so I can get some good grip on that PLA. I could be building parts if I could extruder consistantly. the bore on my current gear is a tad too big so it is wobbling which gives you some extruding and then no extruding, then extruding, then no extruding. New gear with the correct bore size on the way.

Re: New RepRap to slowly be built from Objet parts.

annodomini2 — Sun, 14 Mar 2010 17:37:09 -0400

Step distance setup correctly in the firmware?

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Mon, 08 Mar 2010 18:16:19 -0500

Well if it isn't one thing it is another. Now when I send a part to the machine that is about 2 inches in diameter circular part it draws an oblong part all across the entire platform. I thought I had axes switched but nope all are where they should be. It's like it is building in metric on one axis and inches on the other. The z stage is fine. So wierd. Any thoughts?

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Mon, 08 Mar 2010 16:03:35 -0500

New/correct firmware did the trick now I need to get my extruder to grab a little better. Very hot PLA smells horrible. just so you know.

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Thu, 04 Mar 2010 20:12:15 -0500

Update: Still fighting extruder problems. I can't get that stepper to step no matter what I do. So I am trying to work that one out. I will post pics when I have parts to show.

Re: New RepRap to slowly be built from Objet parts.

jbayless — Thu, 25 Feb 2010 16:07:29 -0500

Nice! Keep up the good work! :D

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Thu, 25 Feb 2010 10:08:55 -0500

OK I got all but the extruder running I know what the problem is. Lookslike I need to change some pinouts since I am using an Arduino Mega. However I sent some g-code to it and it is building away.....not extruding but tracing layers and dropping the platform. So I am almost there. >:D<

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Mon, 22 Feb 2010 22:25:48 -0500

OK I have working X and Y axis. The Z just sits there and ticks .5 MM one way then ticks back the other way. I need to double check my wiring to the Arduimo Mega I am using. Same with the stepper board for the extruder. I was wondering if anyone knew where in the firmware I can change the max distance the x and y are allowed to travel? I can jog each 160 mm then it stops. I have another 100 mm of platform I can use. Any help would be greatly appreciated.

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Sat, 30 Jan 2010 18:15:02 -0500

Ok I was not really thinking here....the extruder motor didn't work because well it was not up to temp yet. I also did some firmware tweaks...then my power supply died.....so I'm going nowhere fast until I can get another power supply. If anyone can think of any other tweaks I need to do let me know I would very much apprciate it.

Curly

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Fri, 29 Jan 2010 22:08:04 -0500

Well I have it all wired up...loaded the firmware I think I got everything tweaked for using a thermister, stepper motor on the extruder and a min and max opto on each axis. I plug everything in go through all of the steps to run the host software in Windows 7 and I have no extruder stepper control at all, x and y only move forward. Z doesn't move at all, and if it sits long enough the z axis twitches.....oh and one of the optoendstop jacks on the y stepper board lights up the endstop it is plugged into. This is all gen 2 electronics they were all tested after they were built and passed inspection....I'm a little overwhelmed as to where to start. Oh and teh extruder heats up. Any ideas? I'm think ing part of the problem is firmware, and part is flakey host software running virtually through eclipse. Thoughts?

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Fri, 22 Jan 2010 11:49:28 -0500

jbayless Wrote:
-------------------------------------------------------
> Is your X-axis stepper mounted correctly? It looks
> a little bit farther back than the place where (I
> think) it's meant to go.

Nope it is not...well that is where it fit, it has that large rouns stand off around the shaft so I just moved it back. That part is made form Polycarb on an FDM Titan so it is holding up very nicely. When my new FDM gets running next week I might run it out of ULTEM for even more strength.

Re: New RepRap to slowly be built from Objet parts.

jbayless — Fri, 22 Jan 2010 00:19:15 -0500

Is your X-axis stepper mounted correctly? It looks a little bit farther back than the place where (I think) it's meant to go.

Re: New RepRap to slowly be built from Objet parts.

dissidence — Thu, 21 Jan 2010 13:28:12 -0500

nice, looks very nice. makes mine look like it was beat with the ungly tree. its still a drastic work in progress but i am getting there day by day

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Wed, 20 Jan 2010 21:08:06 -0500

Well a few more parts and I can start wiring things together. I made a hybrid RepRap/Makerbot extruder with a stepper motor. I also used the Makerbot thermal barrier, heater barrel, nichrome wire, thermister, and kapton tape/ceramic tape setup with an FDM Quantum T-16 tip from our old FDM machine, I also made a part to keep the thermal barrier from bulging and pushing out of the base. It encapsulates the entire barrier, the STL file is on Thingiverse.

DSCF3890.jpg

DSCF3891.jpg

IMG_5601.jpg

IMG_5602.jpg

IMG_5604.jpg

IMG_5607.jpg

Next pics will be of extruded plastic!

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Sun, 17 Jan 2010 20:18:39 -0500

Well had a little vacation but I should have photos soon. I should be extruding plastic in about 2 weeks!

Re: New RepRap to slowly be built from Objet parts.

Steve — Mon, 04 Jan 2010 08:01:00 -0500

Top job!

I love to see one of our machines being used in final assembly.

If anyone does want more information on Objet devices just let me knwow:

steven@ops-uk.com

01283 585 933

www.objetuk.com

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Mon, 23 Nov 2009 21:27:28 -0500

Closer to wiring it all up.

1119091630a.jpg

1123091258a.jpg

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Wed, 18 Nov 2009 22:05:38 -0500

Almost there more pics soon. I had to replace my X Motor Bracket with a Polycarb FDM part because the tension of the drive belt bent the Objet part. Objet makes great parts but as far as continuous load is concerned they then to bend. The platform will be gridded and laser cut acrylic.

1117090659a.jpg

Cheers Curly

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Sun, 15 Nov 2009 11:43:45 -0500

Word to the wise here. Objet parts will crack if you snug up your bolts too tight. Assembly is going very very well. More pics soon.

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Thu, 05 Nov 2009 23:54:58 -0500

Yeah Zcorp really isn't used much in the high dollar machine world for more than just shape studies. Heads up pics coming soon but I started bolting things together today. The Objet parts look awesome and are working great.

Re: New RepRap to slowly be built from Objet parts.

VDX — Thu, 05 Nov 2009 07:12:48 -0500

... or try with moulding - so you can have any structural stability of your moulding material and the geometry of the printed part ...

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Thu, 05 Nov 2009 07:09:01 -0500

freds Wrote:
-------------------------------------------------------
> Your right, though there is local movement at the
> UW to come up with a public domain mix to do
> ceramics.
>
> I wonder if there would be enough physical
> strength to take it down to the art department and
> fire it to support a Mendel?

Might work if you can get an infiltrant that won't get in the way of the paricles fusing. I'm looming for the company but they make a vacuum chamber type infiltrating system that infiltrates Zcorp under vacuum and makes their parts a lot stronger than normal. They might actually be usable. I post it if I find it.

Re: New RepRap to slowly be built from Objet parts.

freds — Thu, 05 Nov 2009 00:57:58 -0500

Your right, though there is local movement at the UW to come up with a public domain mix to do ceramics.

I wonder if there would be enough physical strength to take it down to the art department and fire it to support a Mendel?

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Wed, 04 Nov 2009 06:52:33 -0500

freds Wrote:
-------------------------------------------------------
> I hear you, working with some high school students
> that are building a repstrap.
>
> They also have a powder 3D machine where the
> powder is $500.00 a bucket and not that reliable
> of a machine.

Based on what you just said you have a Zcorp. Biggest waste of RO technology on the market. If you make action figures it's fine anything else that has some functionality to it? Forget about it.

Re: New RepRap to slowly be built from Objet parts.

freds — Tue, 03 Nov 2009 22:48:36 -0500

I hear you, working with some high school students that are building a repstrap.

They also have a powder 3D machine where the powder is $500.00 a bucket and not that reliable of a machine.

Re: New RepRap to slowly be built from Objet parts.

Curlrup — Tue, 03 Nov 2009 12:30:12 -0500

quadshop Wrote:
-------------------------------------------------------
> As a data point, I looked at the cost of printing
> a darwin using a rapid prototyper machine at the
> local university. I used the volume measurements
> from nophead's blog.
>
> It came to about $340 USD. And that is an at-cost
> estimate for just the materials (no markup for
> machine time). This was for both a 3D Systems SLA
> Viper si and an ObJet Eden 350 (they were very
> close in cost).
>
> That's the problem with most commercial RP
> machines - the material costs so damn much. I
> think they have an HP model - sell the printers
> for cheap, and clean up on the refills.
>
> In contrast, the material cost using ABS welding
> rod was something like $20 (again from nophead's
> site).
>
> [hydraraptor.blogspot.com]
> rs-second-child.html

Bottom line professional machines are very expensive to purchase, run, and maintain. That cost get spassed to the consumer.

Re: New RepRap to slowly be built from Objet parts.

quadshop — Tue, 03 Nov 2009 10:07:01 -0500

As a data point, I looked at the cost of printing a darwin using a rapid prototyper machine at the local university. I used the volume measurements from nophead's blog.

It came to about $340 USD. And that is an at-cost estimate for just the materials (no markup for machine time). This was for both a 3D Systems SLA Viper si and an ObJet Eden 350 (they were very close in cost).

That's the problem with most commercial RP machines - the material costs so damn much. I think they have an HP model - sell the printers for cheap, and clean up on the refills.

In contrast, the material cost using ABS welding rod was something like $20 (again from nophead's site).

[hydraraptor.blogspot.com]